Hollow-building-block structure.



W. B. DAVIS. HOLLOW BUILDING 'IBLOUK STRUCTURE. APPLIUATION FILED GOT.21, 1912.

g1,067,8040 Patented Ju1y 22,-1913.

WITNESSES: I VVENTOR.

A TYTORNE'K.

' \To all whom, it may concern:

25 in one side in line with said shoulder on the other side set somewhatwnnvnn B. news, or MADISON counter, um.

' 1 HoLLow-BuILmNe-BLocK srauc'runnj Be it known that I, WEAVER B.DAVIS, a

icitizen of the United States, anda resident bf the county of Madisonand State of Ina 5 diana, have invented a certain new and usefulHoll'ow-Building-Block Structure; and I do hereby declare that thefollowing is a; full, clear, and exact description thereof, referencebeing had to the accompanying d awings, in which like letters refer tolike parts.

The object of this invention is to provide alstrong. and durablestructure formed of hollow concrete blocks and tie bars lying betweenthe series of blocks and interlocking g ther. It is preferably adaptedfor use sloulders thereof for tying the same to- 11} construction ofsilos and like hollow structures where there is an outward thrust orpressure and the structure is made to resist efl'ectually this outwardthrust or pressure. To that end the hollow blocks are all alike and areprovided with an intermediate vertical longitudinal partition and ashoulder artition and 'rom the'partition so that when the blocks arelaid upon each other there is, a space be-- tween the shoulders of theadjacent blocks '30 to receive a-tie bar which surrounds and lies111%011' the outslde of the ser es of shoulders ich are in line with theintermediate partitions in the blocks. This makes it an extremely strdngstructure although built of hollow blocks and since the blocks aresimilar inform, they may be used anywhere in the structure. p

" The nature of the invention will be understoodfrom the accompanyingdrawings 40 and the following description and claims.

In the drawings Figure 1 is a perspective view of a silo' embodying myinvention,

a portion thereof being broken away. Fig.

2 is a perspective on a larger .scale, showing the relative positions ofthe blocks and the reinforcing rods. .Fig. 3 is a perspective view of aortion of the structure adjacent the door w ere the circular tie roddoes not extend through the door butis secured to the vertical rodthrough the door casing,

parts being partially .broken away.

While a silo is shown the inventlon is not necessarily limited to asilo, although it is Specification of Letters Patent.

reamed July 22, 1913.

Application filed October 21, 1912. ScriaiNo. 726,980. I

of peculiar value ina silo or other circular structure.

The structure is made. up of hollow cohcrete blocks 10 and tie bars 11arranged as shown. The blocks are curved longitudinally to sufiicientextent to suit the curvature of the structure anclhave'an inner wallsurface and outer wallsurface and an intermedlate. vertical wall orpartition 21.

The block has twoihollow chambers, one be-i. tween the inner wall andintermediate partition and the other between the intermedi ate partitionand the outer wall, said chambers opening at both ends of the block,There is an upper surface 14 above the inner chamber or opening andanother upper surface 15 above the other chamber or opening, the uppersurface 14 being elevated somewhat above the level of the surface 15; soas to leave a shoulder 19 which is in alinement with and constitutes averticalcontmuatron of the Intermed ate wall, 0r

partition 21. There is a downwardly extending surfacel6 at the undersideof the outer portion. of the block with aninner shoulder 18 spacedsomewhatout and away from the intermediate wall or partition 21 so thatwhen the blocks are placed upon each other there will be a place leftbetween the shoulders 18 and, 19 of the adjacent blocks for the tie bars11 which are shown herein as being round. At each end and near the outerand inner surfaces of each block there 13' a vertical groove 20 forplaster and in tel-locking points of the adjacent blocks.

In ,building a structure the blocks are placed upon each other like anyother concrete blocks or bricks with plaster 23 uniting the joints. Thusone annular layer of blocks is put in place and then a circular tie rod11 is placed upon said series of blocks about the shoulders 19. Everyfifth tie .rod is continuous and extends across the door opening, asshown in Fig; -1. Theremainin tie rods are secured toivertical rods 22 wich are embedded in'the door casings 13." With this construction the tierods cannot expand and the structure cannot enlargeand while theysurround'theshoulders 19 of the series of blocks, the structure willresist any out:

ward thrust or stress arising from the contentsof the silo or structure.Then plaster is placed-upon the upper surface of the layer of blocksaiid: mantras bar: and theiz next layer of blocks is superimposed. andplaster is placed on, the ends of the block 'when they 'are fittogether, and thus the ,t-proces's is continued untillthe-rstructnreeisaz "completed. The door of the SllQ has casmgtte hmughavh chtheb 11 pro-1 6mm 'fom the foregoing descriptlon it is obviousthat an unusually durable structure can be built in the mannerexplainedand with theiblocks' formed as set forth. The

it 7 "outward thrust or stress againstthe inner walljoffthe. silo willpress against the inner wallfoftlieblock and will be chiefly resistedbythe tie-bars 11 and since they lie against theshoulders ltl and theseshoulders are in alin'enjient with the intermediate-par tition 2'1'and'the" portion of the block lying v inside of'sai'd shoulders isrectangular so that thestrain is' transmitted through the inner wall andthe upper and lower walls and throu'ghftheintermediate wall tosaidshoulder andyftiebarj' it is seen that such a structureis'fsubstantially as durable and stron asiffthe blocks were solid and itis the o 'jectof thisinvention to make a structure oftlief kind ofhollow blocks which is as substantial as jone' of "solid blocks and yetit '-ishollowiso"thatthe jwall will readily dry.

When silos are filled with ensilage there is .considerable moisture" orwater in the sameand this-moisture or-water, in blocks of thistype,';will"jnot be transmitted, to or rea'ch' the outer ha lf gi'portion of the blocks so that fremainpractically dry and as theensi'la'ge is removed fromv the silo, the

blocks willreadily because they are hollow)Likewiseheingihollow, theyare more easilyfbuilt'a o'nihan can readily handle themi', v v 1 a Iclainr'as myuiveiition:

I.A bircularfstructure formed of building blockseach*ofwhich islongitudinally hollow andisproyided on one surface with asolidlongitudinal-shoulder on the upper and lower side's, one 'of saidshoulders ex- A ten ding upwardly nd the other extending between' saidshoulders, and a curved tiev ddwnwardly iaud' sard shoulders being outof alin'enient was-each other so that when built.'intoa structure therewill be a space blocks and between the shoulders thereof, zseb tan iel mis tt rt te 2. A circular structure formed of build- 3. Acircularstructure 'formedof building blocks havingtwo lateral walls and anintermediate partition with hollow chambers between them, a longitudinalupwardly extending shoulder in the upper surface ofsaid block inalinement with the intermedia-te partition, a longitudinal downwardlyextending shoulder on the lower surface of said block located at oneside of said intermediate partition so that when the blocks are builttogether said shoulders will be opposite each other, and an endless, tiebar lying between adjacent'series of blocks and between the shouldersthereof, substantially as set forth. Y V

'4. Acircular structure formed of building blocks each of whichislongitudinally hollow and is provided with longitudinal shoulders onthe upper and lower sides, and

in alinement with each other so that when I built into a structurevthere will be a space between said shoulders, an endless tie barlyingbetween some series of said blocks and as set forth,'vert-ica l rodsembedded in the structure, and other, tie bars lying between 7 betweenthe shoulders thereof, substantially other series of said blocks withtheirends connected with :said vertical rods.

In .witness whereof, I have hereunto affixed my signature in thepresenceof the,v witnesses herein named. WEAVER B. DAVIS.

Witnesses: 1

J. H. WELLS, E. H. MAYO.

